JPS628119A - Polygon mirror - Google Patents
Polygon mirrorInfo
- Publication number
- JPS628119A JPS628119A JP14752185A JP14752185A JPS628119A JP S628119 A JPS628119 A JP S628119A JP 14752185 A JP14752185 A JP 14752185A JP 14752185 A JP14752185 A JP 14752185A JP S628119 A JPS628119 A JP S628119A
- Authority
- JP
- Japan
- Prior art keywords
- polygon mirror
- reflected
- laser light
- reflecting surfaces
- beam splitter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、レーザを用い、二次元的に視野を走査し、物
体の有無を認識するシステム、更に詳しくは例えば、一
定視野内に障害物が現われた場合に障害物の存在する方
向に自動的にテレビカメラを向け、監視を行なうシステ
ムに用いるポリゴンミラーに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a system that uses a laser to two-dimensionally scan a field of view and recognize the presence or absence of an object. This invention relates to a polygon mirror used in a monitoring system that automatically directs a television camera in the direction of an obstacle in the event of an obstacle.
従来の技術
上記のような障害物の監視を行なうシステムにおいては
、レーザ光を二次元的に偏向し、目的視野内を走査する
機構が必要となる。BACKGROUND OF THE INVENTION A system for monitoring obstacles as described above requires a mechanism for two-dimensionally deflecting a laser beam and scanning the target field of view.
従来、一般的に用いられているこの種の光偏向走査機構
を第５図に示す。１０１はポリゴンミラーで、ガラス、
金属等により形成され、回転軸と平行となる複数個の反
射面１０２が分割されて形成されている。このポリゴン
ミラー１０１はモータ１０３によって回転駆動される。FIG. 5 shows this type of optical deflection and scanning mechanism that has been commonly used in the past. 101 is a polygon mirror, glass,
It is formed of metal or the like, and is divided into a plurality of reflective surfaces 102 parallel to the rotation axis. This polygon mirror 101 is rotationally driven by a motor 103.
ポリゴンミラー１０１の回転のみでは一次元的走査にな
るので、二次元的に走査を行なう念めに、更に走査ミラ
ーを設ける。Since rotation of the polygon mirror 101 alone results in one-dimensional scanning, a scanning mirror is additionally provided in order to perform two-dimensional scanning.
この走査ミラーには揺動ミラー１０４（図では揺動ミラ
ー１０４の２位置を示している）を用い、または上記と
同様のポリゴンミラーを用いる。As this scanning mirror, a swinging mirror 104 (two positions of the swinging mirror 104 are shown in the figure) or a polygon mirror similar to the above is used.
而してレーザ入射光１０５は、ポリゴンミラー１０１と
揺動ミラー（若しくはポリゴンミラー）１０４により二
次元的に走査される。The laser incident light 105 is two-dimensionally scanned by the polygon mirror 101 and the swinging mirror (or polygon mirror) 104.
発明が解決しようとする問題点
以上のような従来例の構成では、可動のミラーが二対と
なり、高精度の走査を行なうことはできるが、構造が複
雑となり、コスト、システムの寿命、信頼性の面で、上
記のような昼夜無人運転を行なう監視システムに用いる
ことは不利である。Problems to be Solved by the Invention In the conventional configuration as described above, there are two pairs of movable mirrors, and although it is possible to perform high-precision scanning, the structure is complicated, resulting in problems in cost, system life, and reliability. In this respect, it is disadvantageous to use it in a monitoring system that operates unmanned day and night as described above.
そこで、本発明は、特に物体に関する詳細な情報を必要
としｋい場合に適し、物体の有無を高速で走査すること
ができ、また簡単な構造で、コストの低下、システムの
寿命の延長、信頼性の向上を図ることができるようにし
たポリゴンミラーを提供しようとするものである。Therefore, the present invention is particularly suitable for cases where detailed information about an object is required, can scan for the presence or absence of an object at high speed, has a simple structure, reduces costs, extends system life, and is reliable. The object of the present invention is to provide a polygon mirror with improved performance.
問題点を解決するための手段
そして上記問題点を解決するための本発明の技術的な手
段は、回転軸に対する複数個の反射面の角度が互いに異
なるように設定されたものである。A means for solving the problems and a technical means of the present invention for solving the above problems is that the angles of the plurality of reflecting surfaces with respect to the rotation axis are set to be different from each other.
作用
本発明は、上記構成により、回転するポリゴンミラーの
各反射面によりレーザ光を反射させ、この反射されたレ
ーザ光が物体により反射されると、この反射されたレー
ザ光がポリゴンミラーの反射面により反射され、この反
射されたレーザ光により物体を検知することができる。Effect of the present invention With the above configuration, the laser beam is reflected by each reflecting surface of the rotating polygon mirror, and when the reflected laser beam is reflected by an object, the reflected laser beam is reflected by the reflecting surface of the polygon mirror. This reflected laser light can be used to detect objects.
このように１個のポリゴンミラーの回転のみで、二次元
走査を行ない、物体の有無を検知することができる。In this way, by rotating only one polygon mirror, two-dimensional scanning can be performed and the presence or absence of an object can be detected.
実施例 以下、本発明の実施例を図面に基いて詳細に説明する。Example Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図及び第２図に本発明の一実施例におけるポリゴン
ミラーの斜視図及び断面図を示す。FIGS. 1 and 2 show a perspective view and a sectional view of a polygon mirror according to an embodiment of the present invention.
図において本発明のポリゴンミラー１はガラス、金属等
により形成され、外周に複数個（図示例では８個）の反
射面２が形成され、各反射面２は回転軸に対する角度が
互いに異なるように設定されている。上記各反射面２は
少なくとも１度以上で、９０度程度迄の角度差を有する
ように設定されている。このポリゴンミラー１はモータ
３の駆動により回転される。In the figure, a polygon mirror 1 of the present invention is formed of glass, metal, etc., and has a plurality of (eight in the illustrated example) reflective surfaces 2 formed on its outer periphery, and each reflective surface 2 is arranged at a different angle with respect to the rotation axis. It is set. The respective reflecting surfaces 2 are set to have an angular difference of at least 1 degree or more and up to about 90 degrees. This polygon mirror 1 is rotated by the drive of a motor 3.
次に使用例について説明する。第３図において、４はレ
ーザ光源、５はレーザ光源４ホらのレーザ光、６はレー
ザ光５の径を拡大すると共に平行光とするビームエキス
パンダ、７はビームエキスパンダ６からのレーザ光を通
過させるビームスプリッタ、１はビームスプリッタ７を
通過させたレーザ光を反射させる本発明のポリゴンミラ
ー、２はポリゴンミラー１を回転させるモータ、８はビ
ームスプリッタ７で反射されたレーザ光の受光素子、９
は物体である。Next, a usage example will be explained. In FIG. 3, 4 is a laser light source, 5 is a laser beam from the laser light source 4, 6 is a beam expander that expands the diameter of the laser beam 5 and makes it parallel light, and 7 is a laser beam from the beam expander 6. 1 is a polygon mirror of the present invention that reflects the laser beam that has passed through the beam splitter 7, 2 is a motor that rotates the polygon mirror 1, and 8 is a light receiving element for the laser beam reflected by the beam splitter 7. , 9
is an object.
レーザ光源４からのレーザ光５はビームエキスパンダ６
により径が拡大されると共に平行光とされ、ビームスプ
リッタ７を通過して回転されているポリゴンミラー１の
各反射面２により反射される。この反射されたレーザ光
は紙面に垂直な方向と共に５ａ乃至５ｃの方向に投射さ
れる。視野内に物体９が存在するとレーザ光はこの物体
９により５ｄのように反射され、続いてポリゴンミラー
１の反射面２により反射され、更にビームスプリッタフ
により反射され、受光素子８に至って信号として検知さ
れる。Laser light 5 from laser light source 4 is transmitted to beam expander 6
The beam is enlarged in diameter and turned into parallel light, which passes through the beam splitter 7 and is reflected by each reflecting surface 2 of the polygon mirror 1 which is being rotated. This reflected laser light is projected in the directions 5a to 5c as well as in the direction perpendicular to the plane of the paper. When an object 9 exists within the field of view, the laser beam is reflected by this object 9 as shown in 5d, then reflected by the reflective surface 2 of the polygon mirror 1, further reflected by the beam splitter, and reaches the light receiving element 8 as a signal. Detected.
従って１個のポリゴンミラー１の回転のみで、二次元走
査を行ない、物体の有無を検知することができる。Therefore, by only rotating one polygon mirror 1, two-dimensional scanning can be performed and the presence or absence of an object can be detected.
今、反射面２が８分割され、各反射面２の傾きが回転軸
に平行な方向を０°として、＋３５°から一３ダの方向
で下記のように設定され、レーザ光を７♂の範囲に振ら
せるものとする。Now, the reflective surface 2 is divided into 8 parts, and the inclination of each reflective surface 2 is set as shown below in the direction of 13 degrees from +35 degrees, with the direction parallel to the rotation axis being 0 degrees, and the laser beam is It shall be made to swing within the range.
第１面 ＋５６
第２面 −２５゜
第３面 ＋２Ｃ
第４面 −５゜
第５面 ＋３５゜
第６面 −３ダ
第７面 ＋１５゜
第８面 −１−
このように設定すると、第４図の視野１０に対し、各面
の走査は矢で示したようになり、ランダムに視野内を走
査し、視野を８分割して走査は完了する。従って、視野
分割数は８個と粗くはあるが、ランダムに、かつ高速に
全視野の走査を行なうことができる。1st surface +56 2nd surface -25° 3rd surface +2C 4th surface -5° 5th surface +35° 6th surface -3da 7th surface +15° 8th surface -1- With this setting, the 4th surface With respect to the field of view 10 in the figure, each surface is scanned as shown by the arrows, and the field of view is scanned at random, and the field of view is divided into eight parts, and the scanning is completed. Therefore, although the number of visual field divisions is 8, which is rough, the entire visual field can be scanned randomly and at high speed.
発明の効果
以上の説明より明らかなように本発明によれば、回転軸
に対する複数個の反射面の角度を互いに異なるように設
定しているので、回転機構としては１個のみで二次元走
査が可能とｋる。従ってランダムに、ホつ高速に視野内
の物体の有無を感知できる。また構造が簡易で小形化を
図ることができ、コストの低下、システムの寿命の延長
、信頼性の向上を図ることができ、特に監視システム、
ロボットシステムなどに有用である。Effects of the Invention As is clear from the above explanation, according to the present invention, since the angles of the plurality of reflecting surfaces with respect to the rotation axis are set to be different from each other, two-dimensional scanning can be performed with only one rotation mechanism. It's possible. Therefore, the presence or absence of objects within the field of view can be sensed randomly and quickly. In addition, the structure is simple and compact, which reduces costs, extends system life, and improves reliability, especially for monitoring systems.
Useful for robot systems, etc.
第１図は本発明の一実施例におけるポリゴンミラ一番示
す斜視図、第２図はその断面図、第３図は本発明の使用
例を示す概観図、第４図は本発明のポリゴンミラーによ
る視野内走査の概略図、第５図は従来の走査光学系の概
観図である。
１・・・ポリゴンミラー、２・・・反射面、３・・・モ
ータ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第２
図
第３図FIG. 1 is a perspective view of a polygon mirror according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is an overview diagram showing an example of use of the present invention, and FIG. 4 is a polygon mirror of the present invention. FIG. 5 is a schematic view of a conventional scanning optical system. 1... Polygon mirror, 2... Reflective surface, 3... Motor. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3
Claims (1)
うに設定されていることを特徴とするポリゴンミラー。A polygon mirror characterized in that the angles of a plurality of reflecting surfaces with respect to a rotation axis are set to be different from each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14752185A JPS628119A (en) | 1985-07-04 | 1985-07-04 | Polygon mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14752185A JPS628119A (en) | 1985-07-04 | 1985-07-04 | Polygon mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS628119A true JPS628119A (en) | 1987-01-16 |
Family
ID=15432202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14752185A Pending JPS628119A (en) | 1985-07-04 | 1985-07-04 | Polygon mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS628119A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5748357A (en) * | 1995-11-30 | 1998-05-05 | Samsung Electro-Mechanics Co., Ltd. | Optical detecting apparatus |
| US5864391A (en) * | 1996-04-04 | 1999-01-26 | Denso Corporation | Radar apparatus and a vehicle safe distance control system using this radar apparatus |
| US6246502B1 (en) | 1998-11-30 | 2001-06-12 | Aisin Seiki Kabushiki Kaisha | Optical scanning apparatus |
| CN1096957C (en) * | 1997-03-20 | 2002-12-25 | 莱克斯马克国际公司 | Image forming equipment for correcting laser in optic instrument speed increasing period |
| US6937375B2 (en) | 2001-08-31 | 2005-08-30 | Automotive Distance Control Systems Gmbh | Scanning device |
| US7002669B2 (en) | 2001-08-09 | 2006-02-21 | Conti Temic Microelectronic Gmbh | Device for distance measurement |
| US7187445B2 (en) | 2001-07-19 | 2007-03-06 | Automotive Distance Control Systems Gmbh | Method and apparatus for optically scanning a scene |
| JP2010060309A (en) * | 2008-09-01 | 2010-03-18 | Ihi Corp | Laser radar and method of monitoring boundary by same |
| JP2014071027A (en) * | 2012-09-28 | 2014-04-21 | Denso Wave Inc | Laser radar device |
| JP2014071030A (en) * | 2012-09-28 | 2014-04-21 | Denso Wave Inc | Laser radar device |
| US9001312B2 (en) | 2010-03-23 | 2015-04-07 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Light scanning apparatus and separation distance measurement apparatus |
| JP2017213952A (en) * | 2016-05-30 | 2017-12-07 | シャープ株式会社 | Lighting device |
| WO2022225859A1 (en) * | 2021-04-22 | 2022-10-27 | Innovusion, Inc. | A compact lidar design with high resolution and ultra-wide field of view |
| US11644543B2 (en) | 2018-11-14 | 2023-05-09 | Innovusion, Inc. | LiDAR systems and methods that use a multi-facet mirror |
| US11662439B2 (en) | 2021-04-22 | 2023-05-30 | Innovusion, Inc. | Compact LiDAR design with high resolution and ultra-wide field of view |
| US11675053B2 (en) | 2018-06-15 | 2023-06-13 | Innovusion, Inc. | LiDAR systems and methods for focusing on ranges of interest |
| US11675050B2 (en) | 2018-01-09 | 2023-06-13 | Innovusion, Inc. | LiDAR detection systems and methods |
| US11965980B2 (en) | 2018-01-09 | 2024-04-23 | Innovusion, Inc. | Lidar detection systems and methods that use multi-plane mirrors |
| US11977185B1 (en) | 2019-04-04 | 2024-05-07 | Seyond, Inc. | Variable angle polygon for use with a LiDAR system |
-
1985
- 1985-07-04 JP JP14752185A patent/JPS628119A/en active Pending
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5748357A (en) * | 1995-11-30 | 1998-05-05 | Samsung Electro-Mechanics Co., Ltd. | Optical detecting apparatus |
| US5864391A (en) * | 1996-04-04 | 1999-01-26 | Denso Corporation | Radar apparatus and a vehicle safe distance control system using this radar apparatus |
| DE19713826B4 (en) * | 1996-04-04 | 2012-08-09 | Denso Corporation | radar device |
| DE19713826B9 (en) * | 1996-04-04 | 2012-09-27 | Denso Corporation | radar device |
| CN1096957C (en) * | 1997-03-20 | 2002-12-25 | 莱克斯马克国际公司 | Image forming equipment for correcting laser in optic instrument speed increasing period |
| US6246502B1 (en) | 1998-11-30 | 2001-06-12 | Aisin Seiki Kabushiki Kaisha | Optical scanning apparatus |
| US7187445B2 (en) | 2001-07-19 | 2007-03-06 | Automotive Distance Control Systems Gmbh | Method and apparatus for optically scanning a scene |
| US7002669B2 (en) | 2001-08-09 | 2006-02-21 | Conti Temic Microelectronic Gmbh | Device for distance measurement |
| US6937375B2 (en) | 2001-08-31 | 2005-08-30 | Automotive Distance Control Systems Gmbh | Scanning device |
| JP2010060309A (en) * | 2008-09-01 | 2010-03-18 | Ihi Corp | Laser radar and method of monitoring boundary by same |
| US9001312B2 (en) | 2010-03-23 | 2015-04-07 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Light scanning apparatus and separation distance measurement apparatus |
| JP2014071027A (en) * | 2012-09-28 | 2014-04-21 | Denso Wave Inc | Laser radar device |
| JP2014071030A (en) * | 2012-09-28 | 2014-04-21 | Denso Wave Inc | Laser radar device |
| JP2017213952A (en) * | 2016-05-30 | 2017-12-07 | シャープ株式会社 | Lighting device |
| US11675050B2 (en) | 2018-01-09 | 2023-06-13 | Innovusion, Inc. | LiDAR detection systems and methods |
| US11977184B2 (en) | 2018-01-09 | 2024-05-07 | Seyond, Inc. | LiDAR detection systems and methods that use multi-plane mirrors |
| US11965980B2 (en) | 2018-01-09 | 2024-04-23 | Innovusion, Inc. | Lidar detection systems and methods that use multi-plane mirrors |
| US11860313B2 (en) | 2018-06-15 | 2024-01-02 | Innovusion, Inc. | LiDAR systems and methods for focusing on ranges of interest |
| US11675053B2 (en) | 2018-06-15 | 2023-06-13 | Innovusion, Inc. | LiDAR systems and methods for focusing on ranges of interest |
| US11686824B2 (en) | 2018-11-14 | 2023-06-27 | Innovusion, Inc. | LiDAR systems that use a multi-facet mirror |
| US11644543B2 (en) | 2018-11-14 | 2023-05-09 | Innovusion, Inc. | LiDAR systems and methods that use a multi-facet mirror |
| US11977185B1 (en) | 2019-04-04 | 2024-05-07 | Seyond, Inc. | Variable angle polygon for use with a LiDAR system |
| US11662439B2 (en) | 2021-04-22 | 2023-05-30 | Innovusion, Inc. | Compact LiDAR design with high resolution and ultra-wide field of view |
| WO2022225859A1 (en) * | 2021-04-22 | 2022-10-27 | Innovusion, Inc. | A compact lidar design with high resolution and ultra-wide field of view |
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